jquery模仿ui拖放排序 转载

js

 $(document).ready( function () {
 
     var range = { x: 0, y: 0 };//鼠标元素偏移量
     var lastPos = { x: 0, y: 0, x1: 0, y1: 0 }; //拖拽对象的四个坐标
     var tarPos = { x: 0, y: 0, x1: 0, y1: 0 }; //目标元素对象的坐标初始化
 
     var theDiv = null, move = false;//拖拽对象 拖拽状态
     var theDivId =0, theDivHeight = 0, theDivHalf = 0; tarFirstY = 0; //拖拽对象的索引、高度、的初始化。
     var tarDiv = null, tarFirst, tempDiv;  //要插入的目标元素的对象, 临时的虚线对象
    
     $(".main").each(function(){
         $(this).mousedown(function (event){
             //拖拽对象
             theDiv = $(this);
            
             //鼠标元素相对偏移量
             range.x = event.pageX - theDiv.offset().left;
             range.y = event.pageY - theDiv.offset().top;
            
             theDivId = theDiv.index();
             theDivHeight = theDiv.height();
             theDivHalf = theDivHeight/2;
             move = true;
            
             theDiv.attr("class","maindash");
             // 创建新元素 插入拖拽元素之前的位置(虚线框)
             $("<div class='dash'></div>").insertBefore(theDiv);
                    
         });
     });
    
     $(document).mousemove(function(event) {
    
         if (!move) return false;
        
         lastPos.x = event.pageX - range.x;
         lastPos.y = event.pageY - range.y;
         lastPos.y1 = lastPos.y + theDivHeight;
        
         // 拖拽元素随鼠标移动
         theDiv.css({left: lastPos.x + 'px',top: lastPos.y + 'px'});
         // 拖拽元素随鼠标移动 查找插入目标元素
        
         var  $main = $('.main'); // 局部变量:按照重新排列过的顺序  再次获取 各个元素的坐标,
         tempDiv = $(".dash"); //获得临时 虚线框的对象
        
         $main.each(function () {
             tarDiv = $(this);
             tarPos.x = tarDiv.offset().left;
             tarPos.y = tarDiv.offset().top;
             tarPos.y1 = tarPos.y + tarDiv.height()/2;
            
             tarFirst = $main.eq(0); // 获得第一个元素
             tarFirstY = tarFirst.offset().top + theDivHalf ; // 第一个元素对象的中心纵坐标
            
             //拖拽对象 移动到第一个位置
             if (lastPos.y <= tarFirstY) {
                     tempDiv.insertBefore(tarFirst);
             }
             //判断要插入目标元素的 坐标后, 直接插入
             if (lastPos.y >= tarPos.y - theDivHalf && lastPos.y1 >= tarPos.y1 ) {
                 tempDiv.insertAfter(tarDiv);
             }
            
         });
 
     }).mouseup(function(event) {
        
         theDiv.insertBefore(tempDiv);  // 拖拽元素插入到 虚线div的位置上
         theDiv.attr("class", "main"); //恢复对象的初始样式
        
         $('.dash').remove(); // 删除新建的虚线div
         move=false;
        
     });
    
 });
 
 
 </script>

 html

 <body> 
 <div class="box" id="box">
     <div class="main" id="main0">div1</div>
     <div class="main" id="main1">div2</div>
     <div class="main" id="main2">div3</div>
     <div class="main" id="main3">div4</div>
     <div class="main" id="main4">div5</div>
 </div>
 </body>

 css

 body, div { margin: 0; paading: 0; font-size: 12px; }
 body { width: 960px; margin: 0 auto; }
 ul, li { margin: 0; padding: 0; list-style: none; }
 .clear { clear: both; width: 1px; height: 0px; line-height: 0px; font-size: 1px; }
 
 .box { width: 600px; height: auto; margin: 25px 0 0 0; padding: 5px; border: 1px solid #f00; }
 .main { position: static; width: 600px; height: 80px; margin-bottom: 5px; border: 1px solid blue; background: #ccc; }
 .maindash { position: absolute; width: 600px; height: 80px; margin-bottom: 5px; border: 1px dashed blue; background: #ececec; opacity: 0.7; }
 
 .hide { width: 600px; height: 80px; margin-bottom: 5px; }
 .dash { position: sta;tic; width: 600px; height: 80px; margin-bottom: 5px; border: 1px dashed #f00; };

 

posted @ 2012-04-18 11:06  break_happy  Views(316)  Comments(0)    收藏  举报